MCQs On Hydrogen
1. Electrolysis of brine produces
(a) chlorine gas
(b) hydrogen gas
(c) sodium hydroxide
(d) all the above
Answer:::: (d)
2. A reactant containing the element that is oxidised is called
(a) reducing agent
(b) oxidising agent
(c) hydrogen
(d) sublime
Answer:::: (a)
3. By losing one or two electrons the atoms of metal are
(a) oxidised
(b) reduced
(c) hydrogenated
(d) sublimated
Answer:::: (a)
4. Electrolytes conduct electricity in
(a) solid state
(b) liquid state
(c) gaseous state
(d) plasma state
Answer:::: (b)
5. Loss of hydrogen atoms by an element is called
(a) hydrogenation
(b) oxidation
(c) reduction
(d) sublimation
Answer:::: (b)
6. The electrolyte among the following is
(a) NaOH
(b) Urea
(c) glucose
(d) benzene
Answer:::: (a)
7. O-O-H bond angle in H2O2 is
(a) 97°
(b) 106°
(c) 120°
(d) 109°28′
Answer:::: (a)
8. Which of the following is very high for proton?
(a) radius
(b) ionization potential
(c) charge
(d) hydration energy
Answer:::: (d)
9. The list which contains only elements is
(a) air, water, oxygen
(b) hydrogen, oxygen, brass
(c) air, water, fire, earth
(d) calcium, sulphur, carbon
Answer:::: (d)
10. The smallest part of an element that cannot exist as a free state is
(a) ion
(b) charge
(c) atom
(d) molecule
Answer:::: (c)
